JPWO2016063948A1 - Distributed power storage system, power control method, and program - Google Patents

Abstract

The distributed power storage system (1) includes a main power storage system (20) and a sub power storage system (22) connected in parallel to a distribution line (12) connected to the system (10). One power storage system (first power storage system) of the main power storage system (20) and the sub power storage system (22) acquires control information based on the state of power storage means of the other power storage system (second power storage system). An acquisition unit (first acquisition unit) and a control unit (first control unit) that controls charging / discharging operation of the first power storage system based on control information acquired regarding the second power storage system.

Description

  The present invention relates to a distributed power storage system, a power control method, and a program.

  In recent years, power storage systems linked to the grid have been used in various places.

  An example of such a power storage system is disclosed in Patent Document 1 below. Patent Document 1 below discloses a technique for controlling charging / discharging operations of a plurality of storage batteries (secondary batteries) based on power supply and demand prediction information.

JP 2013-106372 A

  In such a power storage system, the discharge depth of each storage battery is one of the factors that influence the effective life of the entire system. Therefore, it is desirable to be able to control each discharge power flexibly when considering the effective life of the entire system.

  The objective of this invention is providing the technique which controls the discharge operation of a secondary battery.

According to the present invention,
Having a first power storage system and a second power storage system connected in parallel to a distribution line connected to the grid,
The first power storage system is
First acquisition means for acquiring control information based on a state of power storage means of the second power storage system;
First control means for controlling a charge / discharge operation of the first power storage system based on the control information acquired with respect to the second power storage system;
A distributed power storage system is provided.

According to the present invention,
A power control method for controlling power of a first power storage system and a second power storage system connected in parallel to a distribution line connected to a system,
The first power storage system is
Obtaining control information based on the state of power storage means of the second power storage system;
Controlling a charge / discharge operation of the first power storage system based on the control information acquired with respect to the second power storage system;
A power control method is provided.

According to the present invention,
A program for executing a power control method for controlling power of a first power storage system and a second power storage system, connected in parallel to a distribution line connected to a system,
A computer included in the first power storage system;
First acquisition means for acquiring control information based on a state of power storage means of the second power storage system;
First control means for controlling a charge / discharge operation of the first power storage system based on the control information acquired with respect to the second power storage system;
A program for functioning as a server is provided.

  According to the present invention, the discharge operation of the secondary battery can be controlled as desired.

  The above-described object and other objects, features, and advantages will become more apparent from the preferred embodiments described below and the accompanying drawings.

It is a figure which shows notionally an example of the process structure of the distributed electrical storage system in 1st Embodiment. It is a flowchart which shows the flow of a process of the distributed electrical storage system in 1st Embodiment. It is a figure which shows the modification of 1st Embodiment. It is a flowchart which shows the flow of a process of the distributed electrical storage system in the modification of 1st Embodiment. It is a figure which shows notionally the processing structure of the distributed electrical storage system in 2nd Embodiment. It is a figure which shows notionally the processing structure of the distributed electrical storage system in 3rd Embodiment. It is a flowchart which shows the flow of a process of the distributed electrical storage system in 3rd Embodiment. It is a block diagram which shows notionally the processing structure of the distributed electrical storage system in 4th Embodiment. It is a flowchart which shows the flow of a process of the distributed electrical storage system in 4th Embodiment. It is a figure which shows notionally the process structure of the distributed electrical storage system in the modification of 4th Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same reference numerals are given to the same components, and the description will be omitted as appropriate.

  In the following description, each component of the distributed power storage system 1 is not a hardware unit configuration but a functional unit block. For example, the main power storage system 20 and the sub power storage system 22 include a CPU and memory of an arbitrary computer, a program loaded in the memory, various storage media for storing the program, a network connection interface, and the like. Realized by any combination. There are various modifications of the implementation method and apparatus.

[First Embodiment]
[Processing configuration]
FIG. 1 is a diagram conceptually illustrating an example of a processing configuration of the distributed power storage system 1 in the first embodiment. As shown in FIG. 1, the distributed power storage system 1 includes a main power storage system 20 corresponding to a main load 30 and a sub power storage system 22 corresponding to a sub load 32. The main power storage system 20, the sub power storage system 22, the main load 30, and the sub load 32 are each connected in parallel to the distribution line 12 connected to the system 10. In the distributed power storage system 1 shown in FIG. 1, the main power storage system 20 is “first power storage system”, the sub power storage system 22 is “second power storage system”, the main load 30 is “first load”, and the sub load 32 is “ It can also be called “second load”.

  As shown in FIG. 1, the main power storage system 20 has a main control unit 202, a main power storage unit 204, and a main acquisition unit 206, and the sub power storage system 22 has a sub control unit 222 and a sub acquisition unit 226. .

  The main power storage unit 204 and the sub power storage unit 224 are power storage devices including, for example, a lithium ion secondary battery or a nickel hydride secondary battery. The main power storage system 20 and the sub power storage system 22 use power conversion means such as an AC (Alternating Current) -DC (Direct Current) converter or a DC-DC converter (not shown) to supply power supplied via the distribution line 12. It is converted into charging power of direct current and a predetermined voltage and stored in each power storage unit. Further, the main power storage system 20 and the sub power storage system 22 convert the power stored in each power storage unit into predetermined discharge power using the power conversion means (not shown) and supply the power via the distribution line 12. The main control unit 202 of the main power storage system 20 manages the power necessary for the main load 30 and basically controls the main load 30 to supply the power of the main power storage unit 204 to the main load 30. In addition, the sub control unit 222 of the sub power storage system 22 manages the power necessary for the sub load 32. Basically, the sub control unit 222 performs control so that the power of the sub power storage unit 224 is supplied to the sub load 32. Yes. The main load 30 is, for example, a load installed in a shared part of a building such as a tenant building (for example, shared lighting, an elevator, or network equipment in a tenant building). The sub load 32 is, for example, a load installed for each floor or section of the building (for example, occupied lighting or OA equipment used in each tenant space). However, the use of the distributed power storage system 1 is not limited to this example.

  Main acquisition unit 206 acquires control information based on the state of sub power storage unit 224. Control information based on the state of the sub power storage unit 224 is acquired by, for example, the sub control unit 222, and the main acquisition unit 206 acquires the control information via the sub control unit 222. The main acquisition unit 206 may be configured to actively acquire the control information by monitoring the sub power storage system 22 constantly or at predetermined intervals, or passively acquire the control information from the sub control unit 222. It may be configured to. Then, the main control unit 202 controls the charge / discharge operation of the main power storage system 20 based on the control information acquired by the main acquisition unit 206. The main acquisition unit 206 can also be called a first acquisition unit.

  The above-described control information is information that can be an indicator of the charge / discharge operation of the first power storage system. For example, the control information is information based on at least one of SOC (State of Charge) or temperature of the sub power storage unit 224. The SOC and temperature of the sub power storage unit 224 can be an index for determining the charge / discharge operation of the main power storage system 20, for example. For example, when the SOC of the sub power storage unit 224 is smaller than a predetermined charging threshold, the main control unit 202 can determine that there is a possibility that the sub power storage system 22 may stop discharging, for example, when charging starts. Then, the main control unit 202 performs control so that the main power storage system 20 covers power necessary for the second load. In this case, the main control unit 202 discharges the electric power necessary for each of the first load and the second load from the main power storage system 20. On the other hand, for example, when the SOC of the sub power storage unit 224 is larger than a predetermined threshold, the main control unit 202 can determine that it is not necessary to bear the necessary power in the sub load 32 managed by the sub power storage system 22. In this case, the main control unit 202 can charge the main power storage system 20 or stop charging / discharging. In this case, the sub power storage system 22 can be controlled to cause the sub power storage unit 224 to output power necessary for each of the first load and the second load. For example, when the temperature of the sub power storage unit 224 exceeds a predetermined upper limit threshold or falls below a predetermined lower limit threshold, the main control unit 202 can determine that there is a possibility that the sub power storage system 22 stops discharging. In this case, the main control unit 202 discharges the power necessary for each of the first load and the second load from the main power storage system 20. Thus, by outputting the electric power necessary for the second load from the main power storage system 20, it is possible to stop the sub power storage system 22 from performing the charge / discharge operation at an abnormal temperature.

[Operation example]
An operation example of the distributed power storage system 1 in this embodiment will be described with reference to FIG. FIG. 2 is a flowchart showing the flow of processing of the distributed power storage system 1 in the first embodiment.

  First, the main acquisition unit 206 acquires control information from the sub power storage system 22 (S102). Then, the main control unit 202 determines whether or not the main power storage system 20 bears the power necessary for the sub load 32 based on the control information acquired in S102 (S104). For example, when the SOC of the sub power storage unit 224 is equal to or lower than a predetermined charging threshold, or when the temperature of the sub power storage unit 224 exceeds a predetermined upper limit threshold or falls below a predetermined lower limit threshold, the main control unit 202 It can be determined that the system 22 may not discharge. In this case, the main control unit 202 controls the main power storage system 20 to bear the power required by the sub load 32 instead of the sub power storage system 22. Further, for example, when the SOC of the sub power storage unit 224 exceeds a predetermined threshold, the main control unit 202 can determine that the main power storage system 20 does not have to bear the power necessary for the sub load 32.

  When the main power storage system 20 bears the power necessary for the sub load 32 (S104: YES), the main control unit 202 needs the sub load 32 in addition to the power necessary for the main load 30 managed by itself. Power is acquired from the sub power storage system 22 (S106). On the other hand, when the main power storage system 20 does not bear the power required by the sub load 32 (S104: NO), the main control unit 202 acquires the power required by the main load 30 managed by itself (S108).

  Then, the main control unit 202 determines whether or not the main power storage system 20 can cover the power acquired in S106 or S108 (S110). When the main power storage system 20 can supply the power necessary for the target load (S110: YES), the main control unit 202 determines the power necessary for the target load as the discharge power of the main power storage system 20 (S112). ). When the main control unit 202 acquires the power required by the main load 30 and the power required by the subload 32 in S106, the main control unit 202 calculates the sum of the power required by the main load 30 and the power required by the subload 32. And determined as the discharge power of the main power storage system 20. Further, when the main control unit 202 acquires the power necessary for the main load 30 in S108, the main control unit 202 determines the power necessary for the main load 30 as the discharge power of the main power storage system 20. On the other hand, when the main power storage system 20 cannot cover the power necessary for the target load (S110: NO), the main control unit 202 sets the upper limit value (for example, rated output power) of the discharge power of the main power storage system 20. Then, it is determined as the discharge power of the main power storage system 20 (S114). Then, the main control unit 202 discharges the main power storage system 20 with the discharge power determined in S112 or S114 (S116). Note that the power shortage in S114 can be supplied from the grid 10 via the distribution line 12 if the grid 10 is available.

[Operation and Effect of First Embodiment]
As described above, in the present embodiment, when the sub power storage system 22 does not discharge, the main power storage system 20 discharges the power necessary for the sub load 32 within a possible range. Thereby, when the main electrical storage system 20 discharges, a vector can be strengthened in the direction of increasing the discharge amount of the main electrical storage system 20. Further, when the sub power storage system 22 is discharged, the main power storage system 20 does not discharge the power required by the main load 30. Thereby, when the sub power storage system 22 is discharged, it is possible to make room for increasing the discharge amount of the sub power storage system 22. According to the present embodiment, more power can be discharged when each power storage system is discharged, and as a result, each power storage system can be controlled to improve the effective life of the entire system.

[Modification of First Embodiment]
FIG. 3 is a diagram illustrating a modification of the first embodiment. In the distributed power storage system 1 shown in FIG. 3, the sub power storage system 22 plays the role of the main power storage system 20 in FIG. In this case, the sub power storage system 22 is referred to as a “first power storage system”, the main power storage system 20 is referred to as a “second power storage system”, the sub load 32 is referred to as a “first load”, and the main load 30 is referred to as a “second load”. You can also. The flow of processing of the distributed power storage system 1 in the present modification is the same as that described above, except that the sub power storage system 22 moves mainly instead of the main power storage system 20. The above-described effect can also be obtained by the configuration shown in FIG.

  The operation of the distributed power storage system 1 in the modification of the first embodiment will be described with reference to FIG. FIG. 4 is a flowchart showing a flow of processing of the distributed power storage system 1 in the modification of the first embodiment.

  First, the sub acquisition unit 226 acquires control information from the main power storage system 20 (S202). Then, the sub control unit 222 determines whether or not the sub power storage system 22 bears the electric power necessary for the main load 30 based on the control information acquired in S202 (S204). For example, when the SOC of the main power storage unit 204 is equal to or lower than a predetermined charging threshold, or when the temperature of the main power storage unit 204 exceeds a predetermined upper limit threshold or falls below a predetermined lower limit threshold, the sub control unit 222 It can be determined that the system 20 may not discharge. In this case, the sub control unit 222 performs control so that the power required by the main load 30 is borne by the sub power storage system 22 instead of the main power storage system 20. Further, for example, the sub control unit 222 can determine that it is better to bring the main power storage system 20 in the direction of discharging when the SOC of the main power storage unit 204 exceeds a predetermined discharge threshold. In this case, the sub control unit 222 can determine that the power required by the main load 30 does not have to be borne by the sub power storage system 22.

  When the sub power storage system 22 bears the power necessary for the main load 30 (S204: YES), the sub control unit 222 is necessary for the main load 30 in addition to the power necessary for the sub load 32 managed by itself. Power is acquired from the main power storage system 20 (S206). On the other hand, when the sub power storage system 22 does not bear the power required by the main load 30 (S204: NO), the sub control unit 222 acquires the power required by the sub load 32 managed by itself (S208).

  Then, the sub control unit 222 determines whether or not the power acquired in S206 or S208 can be covered by the sub power storage system 22 (S210). When the sub power storage system 22 can supply the power required for the target load (S210: YES), the sub control unit 222 determines the power required for the target load as the discharge power of the sub power storage system 22 (S212). ). When the sub control unit 222 acquires the power required by the main load 30 and the power required by the sub load 32 in S206, the sub control unit 222 calculates the sum of the power required by the main load 30 and the power required by the sub load 32. And determined as the discharge power of the sub power storage system 22. In addition, if the sub control unit 222 has acquired the power necessary for the sub load 32 in S208, the sub control unit 222 determines the power necessary for the sub load 32 as the discharge power of the sub power storage system 22. On the other hand, when the sub power storage system 22 cannot supply power necessary for the target load (S210: NO), the sub control unit 222 sets the upper limit value (for example, rated output power) of the discharge power of the sub power storage system 22. Then, it is determined as the discharge power of the sub power storage system 22 (S214). Then, the sub control unit 222 discharges the sub power storage system 22 with the discharge power determined in S212 or S214 (S216). Note that the power shortage in S214 can be supplied from the grid 10 via the distribution line 12 if the grid 10 is available.

[Second Embodiment]
The distributed power storage system 1 of the present embodiment is different from the first embodiment in that the main power storage system 20 has a main acquisition unit 206 and the sub power storage system 22 has a sub acquisition unit 226.

[Processing configuration]
FIG. 5 is a diagram conceptually showing the processing configuration of the distributed power storage system 1 in the second embodiment. As shown in FIG. 5, in the distributed power storage system 1 of the present embodiment, the main power storage system 20 has a main acquisition unit 206, and the sub power storage system 22 has a sub acquisition unit 226. In the present embodiment, when the main power storage system 20 is a “first power storage system”, the sub power storage system 22 is a “second power storage system”. When the sub power storage system 22 is a “first power storage system”, the main power storage system 20 is a “second power storage system”.

[Operation example]
In the distributed power storage system 1 of the present embodiment, the processes shown in FIG. 2 and FIG. 5 are executed independently by the main power storage system 20 and the sub power storage system 22, respectively.

[Operation and Effect of Second Embodiment]
As described above, in the present embodiment, both the main power storage system 20 and the sub power storage system 22 independently execute the processes described in the first embodiment. Thereby, the effect similar to 1st Embodiment can be acquired in both electrical storage systems.

  [Third Embodiment]

[Processing configuration]
FIG. 6 is a diagram conceptually showing the processing configuration of the distributed power storage system 1 in the third embodiment. As shown in FIG. 6, the distributed power storage system 1 of this embodiment further includes a distributed power source 14 in addition to the configurations of the above-described embodiments. In addition, although the detailed structure is abbreviate | omitted in this figure, the main electrical storage system 20 and the sub electrical storage system 22 of this embodiment are either of the some structure demonstrated using the figure in each above-mentioned embodiment. Having at least such a configuration. In the following description, the configuration of the second embodiment will be described as a base.

  The distributed power source 14 is a power generation device that generates power using, for example, sunlight, wind power, gas, or the like. The distributed power source 14 may be provided between the main power storage system 20 and the sub power storage system 22. In FIG. 6, a plurality of distributed power sources 14 may be provided. For example, another distributed power source 14 may be further provided between the main power storage system 20 and the sub power storage system 22.

  The main control unit 202 of the present embodiment, when discharging the main power storage system 20, the difference between the sum of the power necessary for the first load and the power necessary for the second load and the power that can be supplied from the distributed power source 14. Is used to determine the discharge power of the main power storage system 20. In other words, the sub control unit 222 of the present embodiment uses power that can be supplied from the distributed power supply 14 with higher priority than power that can be supplied from the main power storage system 20.

  In addition, when the sub power storage system 22 is discharged, the sub control unit 222 of the present embodiment includes the sum of the power necessary for the first load and the power necessary for the second load, and the power that can be supplied from the distributed power source 14. Is used to determine the discharge power of the sub power storage system 22. In other words, the sub control unit 222 of the present embodiment preferentially uses the power that can be supplied from the distributed power supply 14 over the power that can be supplied from the sub power storage system 22.

[Operation example]
An example of the operation of the distributed power storage system 1 according to this embodiment will be described with reference to FIG. FIG. 7 is a flowchart showing a process flow of the distributed power storage system 1 according to the third embodiment. The processing shown below is executed between S106 or S108 and S110, or between S206 or S208 and S210.

  The main control unit 202 or the sub control unit 222 determines whether or not all the electric power necessary for each load can be covered by electric power that can be supplied from the distributed power supply 14 (S302). Specifically, the main control unit 202 or the sub control unit 222 compares the sum of the power required for the first load and the power required for the second load with the generated power of the distributed power source 14, and the required power It is determined whether all of the above can be supplied from the distributed power source 14. When the sum of the power required for each load is equal to or less than the generated power of the distributed power supply 14 (S302: YES), the main control unit 202 or the sub control unit 222 does not need to output power from each power storage system. The discharge control of the power storage system is not executed.

  On the other hand, when the sum of the power required for each load exceeds the generated power of the distributed power supply 14 (S302: NO), the main control unit 202 or the sub control unit 222 determines that the shortage of power (the power required for each load). The difference between the sum and the generated power of the distributed power source 14 is calculated (S304). Then, the process transitions to S110 or S210. In S110 or S210, it is determined whether each power storage system can cover the shortage of power.

[Operation and effect of the third embodiment]
As described above, in the present embodiment, the power that can be supplied from the distributed power supply 14 is used preferentially over the power that can be supplied from each power storage system. Then, when the power necessary for the first load and the second load exceeds the power that can be supplied from the distributed power source 14, the processing described in the first embodiment and the second embodiment is executed. Thereby, the effect of each above-mentioned embodiment can be acquired, reducing the amount of power purchased from system 10.

[Fourth Embodiment]
[Processing configuration]
FIG. 8 is a block diagram conceptually showing the processing configuration of the distributed power storage system 1 in the fourth embodiment. As shown in FIG. 8, the distributed power storage system 1 of this embodiment further includes an uninterruptible power supply device 16. The uninterruptible power supply 16 supplies power toward the downstream side when the upstream side (system 10 side) fails. In addition, although the detailed structure is abbreviate | omitted in this figure, the main electrical storage system 20 and the sub electrical storage system 22 of this embodiment are either of the some structure demonstrated using the figure in each above-mentioned embodiment. Having at least such a configuration. In the following description, the configuration of the second embodiment will be described as a base.

  When discharging the main power storage system 20 when the uninterruptible power supply 16 is discharged, the main control unit 202 of the present embodiment uses the power supplied from the uninterruptible power supply 16 to generate the discharge power of the main power storage system 20. decide. Specifically, the main control unit 202 uses the difference between the sum of the power required for the first load and the power required for the second load and the power supplied from the uninterruptible power supply 16 to 20 discharge powers are determined. In other words, the main control unit 202 of the present embodiment preferentially uses the power supplied from the uninterruptible power supply 16 over the power that can be supplied from the main power storage system 20.

  In addition, when the sub power storage system 22 is discharged when the uninterruptible power supply 16 is discharged, the sub control unit 222 of the present embodiment uses the power supplied from the uninterruptible power supply 16 to discharge the sub power storage system 22. Determine the power. Specifically, the sub control unit 222 uses the difference between the sum of the electric power required for the first load and the electric power required for the second load and the electric power supplied from the uninterruptible power supply device 16 to use the sub power storage system. 22 discharge power is determined. In other words, the sub control unit 222 of the present embodiment uses the power supplied from the uninterruptible power supply device 16 preferentially over the power that can be supplied from the sub power storage system 22.

[Operation example]
An example of the operation of the distributed power storage system 1 according to this embodiment will be described with reference to FIG. FIG. 9 is a flowchart showing a process flow of the distributed power storage system 1 according to the fourth embodiment. Each process shown below is performed between S106 and S108, or between S206 and S208. Moreover, each process shown below is performed when a power failure occurs upstream from the uninterruptible power supply 16.

  The main control unit 202 or the sub control unit 222 determines whether or not all the electric power necessary for each load can be covered by electric power that can be supplied from the uninterruptible power supply 16 (S402). Specifically, the main control unit 202 or the sub control unit 222 adds the power necessary for the first load and the power necessary for the second load, and the upper limit value of power that can be supplied from the uninterruptible power supply 16 (for example, , Rated output power, etc.) to determine whether all necessary power can be supplied from the uninterruptible power supply 16. When the sum of the power required for each load is equal to or less than the upper limit value of the power that can be supplied from the uninterruptible power supply 16 (S402: YES), it is not necessary to output power from each power storage system. The sub-control unit 222 does not execute the discharge control of each power storage system.

  On the other hand, when the sum of the power required for each load exceeds the upper limit value of power that can be supplied from the uninterruptible power supply 16 (S402: NO), the main control unit 202 or the sub control unit 222 The difference between the sum of the power necessary for the load and the power that can be supplied from the uninterruptible power supply 16 is calculated (S404). Then, the process transitions to S110 or S210. In S110 or S210, it is determined whether each power storage system can cover the shortage of power.

[Operation and effect of the fourth embodiment]
As described above, according to the present embodiment, even when the uninterruptible power supply 16 is operating, the main power storage system 20 and the sub power storage system 22 can be operated in the same manner as in the second embodiment. The same effect can be obtained.

  In addition, the main control unit 202 of the present embodiment performs charging operation of the main power storage system 20 when the uninterruptible power supply 16 is discharged when the main power storage system 20 is located downstream of the uninterruptible power supply 16. It may be configured to be prohibited. Similarly, the sub control unit 222 of the present embodiment may be configured to prohibit the charging operation of the sub power storage system 22 when the uninterruptible power supply 16 is discharged. By doing in this way, generation | occurrence | production of the excess electric power loss by charging again the electric power once stored in the uninterruptible power supply 16 can be suppressed.

  Further, the distributed power storage system 1 of the present embodiment may be configured as shown in FIG. FIG. 10 is a diagram conceptually showing the processing configuration of the distributed power storage system 1 in a modification of the fourth embodiment. In FIG. 10, the uninterruptible power supply 16 is arranged between the main power storage system 20 and the sub power storage system 22.

  In this case, the uninterruptible power supply 16 supplies power when the power stored in the main power storage system 20 is exhausted. In this case, the sub control unit 222 may be configured to execute a control for prohibiting the charging operation of the sub power storage system 22 while the uninterruptible power supply 16 is discharged.

  As mentioned above, although embodiment of this invention was described with reference to drawings, these are the illustrations of this invention, Various structures other than the above are also employable.

  For example, the main control unit 202 may perform control so as to prohibit the charging operation of the main power storage system 20 when the sub power storage system 22 is discharged. Similarly, the sub control unit 222 may perform control so as to prohibit the charging operation of the sub power storage system 22 when the main power storage system 20 is discharged. When the main control unit 202 and the sub control unit 222 acquire information indicating a charge / discharge operation (charge, discharge, charge / discharge stop) as control information from the other power storage system, the other power storage system is based on the control information. It can be determined whether or not the battery discharges. In addition, the main control unit 202 and the sub control unit 222 can determine whether or not the other power storage system is discharged by monitoring a current output from the other power storage system. By doing in this way, it can prevent re-charging the electric power once stored in one electrical storage system with the other electrical storage system. As a result, it is possible to suppress the occurrence of an extra power loss caused by storing the power stored in each power storage system again, and to suppress the deterioration of the utilization efficiency of the power stored in each power storage system.

  In the plurality of flowcharts used in the above description, a plurality of steps (processes) are described in order, but the execution order of the steps executed in each embodiment is not limited to the description order. In each embodiment, the order of the illustrated steps can be changed within a range that does not hinder the contents. Moreover, each above-mentioned embodiment can be combined in the range in which the content does not conflict.

Hereinafter, examples of the reference form will be added.
1.
Having a first power storage system and a second power storage system connected in parallel to a distribution line connected to the grid,
The first power storage system is
First acquisition means for acquiring control information based on a state of power storage means of the second power storage system;
First control means for controlling a charge / discharge operation of the first power storage system based on the control information acquired with respect to the second power storage system;
Distributed power storage system.
2.
The first control means includes
The discharge power of the first power storage system is determined using the sum of the power required for the first load corresponding to the first power storage system and the power required for the second load corresponding to the second power storage system. ,
1. The distributed power storage system described in 1.
3.
It further has a distributed power source,
The first control means includes
Determining the discharge power of the first power storage system using the difference between the sum of the power required for the first load and the power required for the second load and the power that can be supplied from the distributed power source;
2. The distributed power storage system described in 1.
4).
Connected to the distribution line, with the system as the upstream side, further comprising an uninterruptible power supply that supplies power to the downstream side when the upstream power supply fails.
The first control means includes
At the time of discharging the uninterruptible power supply, further using the power supplied from the uninterruptible power supply, to determine the discharge power of the first power storage system,
2. Or 3. The distributed power storage system described in 1.
5.
The first control means includes
When the second power storage system is discharged, the charging operation of the first power storage system is prohibited.
1. To 4. The distributed electrical storage system as described in any one of these.
6).
The second power storage system is
Second acquisition means for acquiring control information based on a state of the power storage means of the first power storage system;
Second control means for controlling a charge / discharge operation of the second power storage system based on the control information acquired with respect to the first power storage system;
1. To 5. The distributed electrical storage system as described in any one of these.
7).
The second control means includes
The discharge power of the second power storage system is determined using the sum of the power required for the first load corresponding to the first power storage system and the power required for the second load corresponding to the second power storage system. ,
6). The distributed power storage system described in 1.
8).
It further has a distributed power source,
The second control means includes
Determining the discharge power of the second power storage system using the difference between the sum of the power required for the first load and the power required for the second load and the power that can be supplied from the distributed power source;
7). The distributed power storage system described in 1.
9.
Connected to the distribution line, with the system as the upstream side, further comprising an uninterruptible power supply that supplies power to the downstream side when the upstream power supply fails.
The second control means includes
At the time of discharge of the uninterruptible power supply, further using the power supplied from the uninterruptible power supply, to determine the discharge power of the second power storage system,
7). Or 8. The distributed power storage system described in 1.
10.
The second control means includes
When the first power storage system is discharged, the charging operation of the second power storage system is prohibited.
6). To 9. The distributed electrical storage system as described in any one of these.
11.
The control information is information based on at least one of SOC (State of Charge) and temperature of the power storage means.
1. To 10. The distributed electrical storage system as described in any one of these.
12
A power control method for controlling power of a first power storage system and a second power storage system connected in parallel to a distribution line connected to a system,
The first power storage system is
Obtaining control information based on the state of power storage means of the second power storage system;
Controlling a charge / discharge operation of the first power storage system based on the control information acquired with respect to the second power storage system;
A power control method.
13.
The first power storage system is
The discharge power of the first power storage system is determined using the sum of the power required for the first load corresponding to the first power storage system and the power required for the second load corresponding to the second power storage system. ,
Including. The power control method described in 1.
14
A distributed power supply is further provided,
The first power storage system is
Determining the discharge power of the first power storage system using the difference between the sum of the power required for the first load and the power required for the second load and the power that can be supplied from the distributed power source;
13. Including The power control method described in 1.
15.
An uninterruptible power supply that supplies power to the downstream side when the power supply on the upstream side is connected to the distribution line and the upstream side of the system is a power failure.
The first power storage system is
At the time of discharging the uninterruptible power supply, further using the power supplied from the uninterruptible power supply, to determine the discharge power of the first power storage system,
13. Including Or 14. The power control method described in 1.
16.
The first power storage system is
When the second power storage system is discharged, the charging operation of the first power storage system is prohibited.
Including. To 15. The power control method according to any one of the above.
17.
The second power storage system is
Obtaining control information based on the state of power storage means of the first power storage system;
Controlling a charge / discharge operation of the second power storage system based on the control information acquired with respect to the first power storage system;
Including. To 16. The power control method according to any one of the above.
18.
The second power storage system is
The discharge power of the second power storage system is determined using the sum of the power required for the first load corresponding to the first power storage system and the power required for the second load corresponding to the second power storage system. ,
Including. The power control method described in 1.
19.
A distributed power supply is further provided,
The second power storage system is
Determining the discharge power of the second power storage system using the difference between the sum of the power required for the first load and the power required for the second load and the power that can be supplied from the distributed power source;
Including. The power control method described in 1.
20.
An uninterruptible power supply that supplies power to the downstream side when the power supply on the upstream side is connected to the distribution line and the upstream side of the system is a power failure.
The second power storage system is
At the time of discharge of the uninterruptible power supply, further using the power supplied from the uninterruptible power supply, to determine the discharge power of the second power storage system,
Including. Or 19. The power control method described in 1.
21.
The second power storage system is
When the first power storage system is discharged, the charging operation of the second power storage system is prohibited.
Including. To 20. The power control method according to any one of the above.
22.
The control information is information based on at least one of SOC (State of Charge) and temperature of the power storage means.
12 To 21. The power control method according to any one of the above.
23.
A program for executing a power control method for controlling power of a first power storage system and a second power storage system, connected in parallel to a distribution line connected to a system,
A computer included in the first power storage system;
First acquisition means for acquiring control information based on a state of power storage means of the second power storage system;
First control means for controlling a charge / discharge operation of the first power storage system based on the control information acquired with respect to the second power storage system;
Program to function as.
24.
The first control means includes
The discharge power of the first power storage system is determined using the sum of the power required for the first load corresponding to the first power storage system and the power required for the second load corresponding to the second power storage system. ,
23. The program described in.
25.
A distributed power supply is further provided,
The first control means includes
Determining the discharge power of the first power storage system using the difference between the sum of the power required for the first load and the power required for the second load and the power that can be supplied from the distributed power source;
24. The program described in.
26.
An uninterruptible power supply that supplies power to the downstream side when the power supply on the upstream side is connected to the distribution line and the upstream side of the system is a power failure.
The first control means includes
At the time of discharging the uninterruptible power supply, further using the power supplied from the uninterruptible power supply, to determine the discharge power of the first power storage system,
24. Or 25. The program described in.
27.
The first control means includes
When the second power storage system is discharged, the charging operation of the first power storage system is prohibited.
23. To 26. The program as described in any one of these.
28.
The second power storage system is
Second acquisition means for acquiring control information based on a state of the power storage means of the first power storage system;
Second control means for controlling a charge / discharge operation of the second power storage system based on the control information acquired with respect to the first power storage system;
23. To 27. The program as described in any one of these.
29.
The second control means includes
The discharge power of the second power storage system is determined using the sum of the power required for the first load corresponding to the first power storage system and the power required for the second load corresponding to the second power storage system. ,
28. The program described in.
30.
A distributed power supply is further provided,
The second control means includes
Determining the discharge power of the second power storage system using the difference between the sum of the power required for the first load and the power required for the second load and the power that can be supplied from the distributed power source;
29. The program described in.
31.
An uninterruptible power supply that supplies power to the downstream side when the power supply on the upstream side is connected to the distribution line and the upstream side of the system is a power failure.
The second control means includes
At the time of discharge of the uninterruptible power supply, further using the power supplied from the uninterruptible power supply, to determine the discharge power of the second power storage system,
29. Or 30. The program described in.
32.
The second control means includes
When the first power storage system is discharged, the charging operation of the second power storage system is prohibited.
28. To 31. The program as described in any one of these.
33.
The control information is information based on at least one of SOC (State of Charge) and temperature of the power storage means.
23. To 32. The program as described in any one of these.

  This application claims the priority on the basis of Japanese application Japanese Patent Application No. 2014-216260 for which it applied on October 23, 2014, and takes in those the indications of all here.

Claims (13)

Having a first power storage system and a second power storage system connected in parallel to a distribution line connected to the grid,
The first power storage system is
First acquisition means for acquiring control information based on a state of power storage means of the second power storage system;
First control means for controlling a charge / discharge operation of the first power storage system based on the control information acquired with respect to the second power storage system;
Distributed power storage system. The first control means includes
The discharge power of the first power storage system is determined using the sum of the power required for the first load corresponding to the first power storage system and the power required for the second load corresponding to the second power storage system. ,
The distributed power storage system according to claim 1. It further has a distributed power source,
The first control means includes
Determining the discharge power of the first power storage system using the difference between the sum of the power required for the first load and the power required for the second load and the power that can be supplied from the distributed power source;
The distributed power storage system according to claim 2. Connected to the distribution line, with the system as the upstream side, further comprising an uninterruptible power supply that supplies power to the downstream side when the upstream power supply fails.
The first control means includes
At the time of discharging the uninterruptible power supply, further using the power supplied from the uninterruptible power supply, to determine the discharge power of the first power storage system,
The distributed power storage system according to claim 2 or 3. The first control means includes
When the second power storage system is discharged, the charging operation of the first power storage system is prohibited.
The distributed electrical storage system of any one of Claim 1 to 4. The second power storage system is
Second acquisition means for acquiring control information based on a state of the power storage means of the first power storage system;
Second control means for controlling a charge / discharge operation of the second power storage system based on the control information acquired with respect to the first power storage system;
The distributed electrical storage system of any one of Claim 1 to 5. The second control means includes
The discharge power of the second power storage system is determined using the sum of the power required for the first load corresponding to the first power storage system and the power required for the second load corresponding to the second power storage system. ,
The distributed power storage system according to claim 6. It further has a distributed power source,
The second control means includes
Determining the discharge power of the second power storage system using the difference between the sum of the power required for the first load and the power required for the second load and the power that can be supplied from the distributed power source;
The distributed power storage system according to claim 7. Connected to the distribution line, with the system as the upstream side, further comprising an uninterruptible power supply that supplies power to the downstream side when the upstream power supply fails.
The second control means includes
At the time of discharge of the uninterruptible power supply, further using the power supplied from the uninterruptible power supply, to determine the discharge power of the second power storage system,
The distributed power storage system according to claim 7 or 8. The second control means includes
When the first power storage system is discharged, the charging operation of the second power storage system is prohibited.
The distributed electrical storage system of any one of Claim 6 to 9. The control information is information based on at least one of SOC (State of Charge) and temperature of the power storage means.
The distributed electrical storage system of any one of Claim 1 to 10. A power control method for controlling power of a first power storage system and a second power storage system connected in parallel to a distribution line connected to a system,
The first power storage system is
Obtaining control information based on the state of power storage means of the second power storage system;
Controlling a charge / discharge operation of the first power storage system based on the control information acquired with respect to the second power storage system;
A power control method. A program for executing a power control method for controlling power of a first power storage system and a second power storage system, connected in parallel to a distribution line connected to a system,
A computer included in the first power storage system;
First acquisition means for acquiring control information based on a state of power storage means of the second power storage system;
First control means for controlling a charge / discharge operation of the first power storage system based on the control information acquired with respect to the second power storage system;
Program to function as.

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